Add "REQUIRES: native" to test.

This test was failing on the PS4 bot because the test attempts to link, but the PS4 platform requires an external
linker that is not present, causing the test to fail. This should get the PS4 bot green again.

Author: dyung

cross-project-tests/debuginfo-tests/clang_llvm_roundtrip/simplified_template_names.cpp

@@ -2,6 +2,7 @@
 // RUN: mkdir %t
 // RUN: %clang -fblocks %s -o %t/a.out -g -Xclang -gsimple-template-names=mangled -Xclang -debug-forward-template-params 
 // RUN: llvm-dwarfdump %t/a.out --verify
+// REQUIRES: native
 template<typename ...Ts>
 struct t1 {
 };